Keratometer



FIG. 1 is a front elevational view of a keratometer showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view as seen from the left of FIG. 1;

FIG. 6 is a side elevational view as seen from the right of FIG. 1 and

FIG. 7 is a perspective view thereof, with the keratometer in mounted position; the broken line showing of the microscope and power cord being for illustrative purposes only and forming no part of the claimed design and portions of the design being omitted for ease of illustration. 

The ornamental design for a keratometer, as shown and described. 